Wellllll - it is, for US. I bet you see that "US" part a lot

.
Our bottom line story - total payback of our upfront cash within 7 years, as compared to hotel room with typical 35% discount thrown in. Yup, did the "time value of money" thing.... but because we bought in at the START of the FED's Interest Rate Starvation Program? We got a better REAL return rate with DVC

. (Note - don't want to hear about the Stock Market.... we are retired, and also don't go to Reno).
Now, the details....
1) We refused to buy ANYTHING until Disney came up with a contract, through Disney, homing us at the VWL. We ALWAYS go to the Lodge - have, since 2007, twice per year, eight days per trip. We bought into DVC in June, 2013, AFTER RENTING there (doing a rental tryout is really GOOD advice).
2) NO FINANCING. This one is a KILLER for most folks... and here is where you SERIOUSLY need to get out the EXCEL spreadsheet. Initial CASH investment: $28,000. But if one can do this? One can avoid the killer Financing Rates associated with DVC. That "PAY CASH" approach is going to vary with every family considering DVC - just for US? We had it, it wasn't going to make much in the Banks, and we choked it up. Tracking our progress yearly? I'm STILL glad we did this - in OUR case, we made an effective killing on our money.
3) HOW would I consider this a killing? Again - OUR family. Just two of us, retired, and (THIS IS VERY IMPORTANT!) ... we were going to go to WDW, twice per year, every year, for a total of 16 days.... NO MATTER WHAT. If you are not SURE you are going to go, haven't thrown in a yearly hard budget item for "trips to WDW"? Don't buy into DVC.
So how have we done? Been tracking this every year since we bought in. At the end of 2015, our initial $28K investment will be down to $16K. "Down" is the result of our real historical cost vs the cost of a discounted comparable main hotel room (NOT at rack - at ACTUAL DISCOUNTED PRICE, which is the REAL price).
Projections (which have held up so far with yearly data) indicate break-even in November 2018. "Break Even" means we will have accounted for all yearly dues, plus up front cash, and calculated interest LOST on the up front cash. We will be at "ZERO" - no money saved, none spent. We will be 66 years of age.
After 2018? NOW we actually make money... until 2042 (when we are 90), and the contract dies. Here is the pertinent point: DVC is not a timeshare. DVC is pre-paid lodging with a legal CAP on yearly price increases, with a serious up front capital cost that will result in VASTLY lower costs after about five to seven years. You will make no money with DVC until those up front costs are paid off.... and you will not effectively pay them off unless you are going to GO to WDW on a regular basis ANYWAY.
So, for us? This has been a great deal. But again - that's for US. If there is one take away I would offer? DO NOT FINANCE a DVC contract. Have the cash to invest, or walk away.